22501144 has 8 divisors (see below), whose sum is σ = 42189660. Its totient is φ = 11250568.

The previous prime is 22501139. The next prime is 22501151. The reversal of 22501144 is 44110522.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1406314 + ... + 1406329.

Almost surely, 2^22501144 is an apocalyptic number.

It is an amenable number.

22501144 is a deficient number, since it is larger than the sum of its proper divisors (19688516).

22501144 is a wasteful number, since it uses less digits than its factorization.

22501144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2812649 (or 2812645 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 22501144 is about 4743.5370769079. The cubic root of 22501144 is about 282.3155932286.

Adding to 22501144 its reverse (44110522), we get a palindrome (66611666).

The spelling of 22501144 in words is "twenty-two million, five hundred one thousand, one hundred forty-four".